109 lines
2.9 KiB
Tal
109 lines
2.9 KiB
Tal
( repl-regex.tal )
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%dbg { #ff #0e DEO }
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%sp { #20 #18 DEO }
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%nl { #0a #18 DEO }
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%exit { #01 #0f DEO BRK }
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( read in regular expressions )
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( and emit internal structures parsed )
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|0100
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;r-prompt ;println JSR2
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;r-read-stdin #10 DEO2 BRK
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( we use two different prompts depending on what mode we're in )
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@r-prompt "enter 20 "regex: 20 00
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@s-prompt "string 20 "to 20 "match: 20 00
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@regex $2 ( compiled regex address (if any) )
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@buffer $1000 ( buffer to read user input )
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@ptr :buffer ( next byte to write in buffer )
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@println ( s* -> )
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&loop LDAk #00 EQU ,&eof JCN
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LDAk #18 DEO INC2 ,&loop JMP
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&eof POP2 JMP2r
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@r-read-stdin ( -> )
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#12 DEI #0a EQU ,&execute JCN
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#12 DEI ;ptr LDA2 STA
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;ptr LDA2k INC2 SWP2 STA2
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BRK
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&execute
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#00 ;ptr LDA2 STA
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;buffer ;ptr STA2
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;buffer ;compile JSR2 dbg nl
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DUP2 ;regex STA2
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;emit-stack JSR2 nl
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;emit-arena JSR2 nl
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;reset-arena JSR2
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POP2
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;s-prompt ;println JSR2
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;s-read-stdin #10 DEO2 BRK
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BRK
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@s-read-stdin ( -> )
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#12 DEI #0a EQU ,&execute JCN
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#12 DEI ;ptr LDA2 STA
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;ptr LDA2k INC2 SWP2 STA2
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BRK
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&execute
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#00 ;ptr LDA2 STA ( null terminate string )
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;ptr LDA2 ;buffer EQU2 STH ( stash is-empty? )
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;buffer ;ptr STA2 ( reset ptr )
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;buffer ;regex LDA2 ;match JSR2 ( match regex )
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;emit-byte JSR2 nl ( print result )
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STHr ,&was-empty JCN
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;s-prompt ;println JSR2
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BRK
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&was-empty
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;r-prompt ;println JSR2
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;r-read-stdin #10 DEO2 BRK
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BRK
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~regex.tal
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@emit-short ( short* -- )
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SWP ;emit-byte JSR2 ;emit-byte JSR2 JMP2r
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@emit-byte ( byte^ -- )
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DUP #04 SFT ,&hex JSR #0f AND ,&hex JMP
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&hex #30 ADD DUP #39 GTH #27 MUL ADD emit
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JMP2r
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( print stack size, followed by contents )
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@emit-stack ( -> )
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space LIT 'n emit LIT '= emit ;stack-pos LDA2 ;stack-bot SUB2 #0004 DIV2 ;emit-short JSR2 LIT ': emit
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;stack-bot
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&loop
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DUP2 ;stack-pos LDA2 LTH2 ,&ok JCN
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POP2 newline JMP2r
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&ok
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space LDA2k ;emit-short JSR2
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#0002 ADD2 ,&loop JMP
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( emit n bytes from the given address )
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@emit-n ( addr* count^ -> addr2* )
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DUP #00 GTH ( addr count count>0? ) ,&ok JCN ( addr count ) POP newline JMP2r
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&ok
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STH ( addr [count] ) space LDAk ;emit-byte JSR2 INC2 ( addr+1 [count] )
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STHr #01 SUB ( addr+1 count-1 )
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;emit-n JMP2
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( emit the arena, with one line per node )
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( parses node type, since node size is dynamic (3-5). )
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@emit-arena ( -> )
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;arena-bot
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&loop
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DUP2 ;arena-pos LDA2 LTH2 ,&ok JCN POP2 JMP2r
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&ok
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DUP2 ;emit-short JSR2
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LIT ': emit space
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LDAk #01 NEQ ,&!1 JCN #03 ;emit-n JSR2 ,&loop JMP
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&!1 LDAk #02 NEQ ,&!2 JCN #03 ;emit-n JSR2 ,&loop JMP
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&!2 LDAk #03 NEQ ,&!3 JCN #04 ;emit-n JSR2 ,&loop JMP
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&!3 LDAk #04 NEQ ,&!4 JCN #05 ;emit-n JSR2 ,&loop JMP
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&!4 LDAk #05 NEQ ,&!5 JCN #05 ;emit-n JSR2 ,&loop JMP
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&!5 ;unknown-node-type ;error! JSR2
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